Clamping means for core-plates of dynamo-electric machines.



PATENTED JUNE 23, 1908.

G. E. LORD & W. H. POWELL.

GLAMPING MEANS FOR GORE PLATES 0F DYNAMO BLEOTRIOMAGHINES.

APPLICATION FILED SEPT.14. 1905. RENEWED-TAN. 22. 1908 2 SHEETS-SHEET 1.

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UNITED STATES PATENT OFFICE.

CHARLES E. LORD-AND WILLIAM H. POW-ELL OF NORWOOD, OHIO, ASSIGNORS TO THE BUL- LOOKELEGTRIO MANUFACTURING COMPANY, A CORPORATION. OF OHIO.

CLAMFING KEANS FOR CORE-PLATES OF DYNAMO-ELECTRIC MACHINES.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed September 14, 1905, Serial No. 278,486. Renewed January 22, 1908. Serial No. 412,225.

and'l VI LIAM H. POWELL, citizens of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have,

invented certain new and useful Improvements 'inClamping Means for Core-Plates of. Dynamo-Electric Machines, of which the fol lowing is a full, clear, and exact specification.

\ 'Oui' invention relates to dynamo electric machines and particularly to the means for securely holding in position the laminae of the cores of either the rotor or stator.

The object of our invention is to provide a simple, inexpensive and effective means for retaining the laminae in position and one that can be easily applied to the machine or removed when it is desired to remove the laminae.

In carrying out our invention we clamp the laminze between an abutment and a ring, the ring being partially seated in a groove in a support such as a shaft, spider or frame, and retained therein by an overhanging and projecting portion of the support.

More specifically considered our invention consists of a core of a dynamo electric machine comprising laminze, the laminae being clamped on the support between an abutment and a plate, the late being held in position by a T1110 partial y seated in a groove in. the support, t is groove and ring having engaging faces so inclinedthat accidental'outward displacement is 'revented.

Our invention furt er consists in certain novel details of construction and combination of elements describedin thes ecifica-- tions and set forth in the a pended c aims.

For a more complete understanding of our invention, reference is had to the accompanying drawings in which Figure l is a sectional elevation of a rotor having the laminae mounted on a spider and held in position by our improved retaining means; lfig. 2 is an end View of the same; Fig. 3 is a sectional elevation of a rotor having the laminae mounted directly on the shaft and held in .osition by ourv im roved retaining means; ig. 4 is an enlarge section and Fig. 5 is an elevation of the s ring ring employed in our retaining means; ig. 6 is a detail of one form of the groove in which the ring is seated to hold the laminae in lace; Fig. 7 is an enlarged seotional'view of the retaining means shown in Figs. 12 and 3; and Figs.

8-9 and 10 are sections showing modified forms of our invention.

Referring to the figures of the drawing 15 is the rotor shaft on which is rigidly mounted as shown in Figs. land 2-the s ider 16. Atone end of the spider is an endlead orplate, in' this case the circumferential flange or abutment 17 and near the other end is the circumferential or annular groove 18. In the preferred form of our invention the groove is of the form shown in Fig. 6 having one' perpendicular side 19 and an inclined or under cut side 20. At a'suitable distance from the flange or end-head 17 is a second end-head or plate 21 having preferably the same outer diameter as the flange 17. The laminae 22 are clamped between the flange 17 and plate 21. The lamime and or split ring '23 seated in the groove 18. The ring 23, is in the preferred form of our inven tion, of the shape shown in Figs. 4 and 5, having one perpendicular and one inclined 'side as shown in Fig. 4. The greatest width of the ring is slightly less than the narrowest part of the groove.

In assembling the parts, the lamina and plate 21 are mounted on the spider and pressed againstthe flange by any suitable means, to a point beyond the groove. The ring is next sprung into place and by the pressure of the lamina an plate 21, the inclined, side is held firmly against the underout side of the groove. It will be seen that it is impossible for the ring to accidentally come out of place on account of the engaging inclined and undercut sides of the ring and groove. When it is desired ,to remove the laminae, the latter are compressed slightly until the pressure is no longer on the ring, when it can be easily removedfrom the groove.

In Fig. 3 we have shown our invention applied-to a sh htly different type of machine in which the amines are mounted directly on the shaft 24. The shaft is provided with a shoulder or abutment'25 against which the plate 26 rests. The laminae are held between plate 26 and plate 27 by a ring seated in a groove in the shaft similar to the groove in the spider shown in Fig. 1.

may have variety of forms.

th'e overhanging edge of the side of the groove plate 21 are retained in position by a spring The engaging faces of the groove and ring For example Fig. 8, the inclined face of the ring is rovided with a circumferential groove in w ich is peened as shown at 28. In Fig. 9 the ring is provided with a shoulder 29, which engages the inclined side of the groove. In Fig. 10, neither the ring nor the groove is provided with inclined. sides but the ring is provided with a shoulder 30, over which the edge of the groove is peened.

Thus it will be seen that our invention is capable of a great many modifications and we aim to cover all the modifications which do not depart from the spirit of our invention. Itis evident that our invention may be aplied to the stator as Well as the rotor.

What we claim as newand desire to secure by Letters Patent is 1. In a dynamo electric machine, a core comprising laminae, a support therefor, said support being provided with an abutmentand at a suitable distance from said abutment a circumferential groove, and a ring seated in said groove, the laminae being clamped between the abutment and ring and said ring being held in the groove by an overhanging portion of the support.

2.1n a dynamo-electric machine, a core com risin laminae a supporting element on whic the laminae, are mounted, the supporting element having an abutment and at a suitable distance therefrom an undercut groove, and a ring partially seated in said groove for clamping the laminae against the abutment, the ring being normally held from 3 outward displacement by the undercut por- 1 tion of the groove. 3. In a dynamo-electric machine, a suportmg member provided with a pair of endeads or plates and a circumferential groove near one of said end-heads or plates, lamime clamped between the end-heads or plates, and a ring seated partially in the groove for holding the laminae and adjacent end-head in position, said ring and groove having engaging inclined faces.

4. A means for clamping laminae on a support comprising a ring seated in a groove in the support, said groove having an undercut side and said ring having an engagin inclined face, whereby accidental disp acement of the ring is )revcnted.

5. A means for c amping laminae of a core to a support, comprising an abutment and a spring ring, said support having a groove in which the ring is partially seated, and means for preventing displacement of the ring comprising an overhanging portion of the support and. an engaging shoulder on the ring.

In testimony whereof we allix our signatures, in the presence of two witnesses.

CHAR LES E. LO it D \VILLIAM lI. POWELL.

Witnesses:

ARTHUR 1*. Kwis, FRED J. Kinsey. 

